Tripods open up the world of night photography, so grab one of those when you can. I'm tempted to say that long exposures are almost always more pleasing than super fast or pushed film. Good luck with your experiments.

I was under the impression that a tripod was used. The only way to really shoot something like city scenes at night would be to use the f/1 Leica lenses, open wide and use 3200 film. Clay Harmon has done this very successfully.
But it takes a lot of patience, and a tripod is definitely the door opener at night. Most of my night exposures are shot at f/8 or so, and around 5-10 minutes depending on illumination.

"Often moments come looking for us". - Robert Frank

"Make good art!" - Neil Gaiman

"...the heart and mind are the true lens of the camera". - Yousuf Karsh